Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 245/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 29.65 (753) | 4.33 (110) 17.1% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 79.53 (2020.04) | 93.13 (2365.62) | 13.61 (345.58) 17.1% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 4.82 (122.5) | 2.17 (55) 81.5% |
| Revolutions per mile (km) | 796.69 (495.04) | 680.31 (422.72) | -116.38 (-72.32) -14.6% |
245/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.42 mph (37.69 km/h) |
| 25 mph (40.23 km/h) | 29.28 mph (47.12 km/h) |
| 30 mph (48.28 km/h) | 35.13 mph (56.54 km/h) |
| 35 mph (56.33 km/h) | 40.99 mph (65.96 km/h) |
| 40 mph (64.37 km/h) | 46.84 mph (75.39 km/h) |
| 45 mph (72.42 km/h) | 52.7 mph (84.81 km/h) |
| 50 mph (80.47 km/h) | 58.55 mph (94.23 km/h) |
| 55 mph (88.51 km/h) | 64.41 mph (103.66 km/h) |
| 60 mph (96.56 km/h) | 70.26 mph (113.08 km/h) |
| 65 mph (104.61 km/h) | 76.12 mph (122.5 km/h) |
| 70 mph (112.65 km/h) | 81.98 mph (131.93 km/h) |
| 75 mph (120.7 km/h) | 87.83 mph (141.35 km/h) |
| 80 mph (128.75 km/h) | 93.69 mph (150.77 km/h) |
| 85 mph (136.79 km/h) | 99.54 mph (160.2 km/h) |
| 90 mph (144.84 km/h) | 105.4 mph (169.62 km/h) |
| 95 mph (152.89 km/h) | 111.25 mph (179.04 km/h) |
| 100 mph (160.93 km/h) | 117.11 mph (188.47 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1731 | 2011 | 2166 | 2262 | 2365 | 2438 | 2520 | 2615 | 2748 | 2881 | 3028 | 3146 | 3359 | 3595 | 3779 | 3897 | 3963 | 4207 | 4545 | 5282 |
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